If you are a registered player with FIFA and you are unavaialable to play in an internation played on a recoginised international date you are not allowed play for your club for either the next 1 or 2 games without the express permission of your national FA. There are no exceptions to this rule, so if you are withdrawn because of injury you can not play for your club the following week even if the injury has healed without your FA's permisssion.